Antifogging device



Jan. 10, 1933. w. T. SHERER ANTIYFOGGING DEVICE Filed 095. 27. 1927 a a a a f wm 3 r J L 1 W Q 5% 4 wf Mm G n 4 lr fy -fl Patented 10, 1933.

UNITED STATES.

WILLIAM T. SHEREB, CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

PATENT OFFICE REUBEN E. OTTENHEIMEB, OF BALTIMORE, MARYLAND ANTIFOGGING DEVICE Application filed December 27, 1927. Serial No. 242,644.

This invention relates to a show case and particularly to a means for preventing foggmg of the glass. The invention is illustrated here in connection with a closed show case having atransparent front which embodies three thicknesses of glass. The 1nvent1on 1s,

however, applicable to any place where two a or morethicknesses of glass are used, and

has for its general object to prevent fogging between the glasses,that is, to prevent fogmg of the inside surfaces of the glasses. r tnother object of the invention is to provide means for absorbing from the space between the glasses any moisture which may have.

Figure 1 is a fragmentary front elevation of the show case;

Figure 2 1s a transverse cross section on an enlarged scale, taken on line 22 of Figurel;

Fi re 3 is a vertical cross section ,on an enlarged scale, slightlysmaller than that of Fi re 2, taken on line 3-3 of Figure 1;

ike parts are indicated by like characters throughout the drawing and specification.

A represents the front of the show case. It is provided generally with frame members A A a top A and a further frame memher A.

The member A is provided with a central cavity or opening B. In one side of the cavity B is an opening B which may be closed by a removable 'cover 13 which has on its inner surfacecork or other insulation B In opposite sides of the member A are formed openings B. These openlngs may be of any suitable shape and may be formed in any number desired. Their purpose is to provide a ready means for the passage of air from the space between the glasses into the cavit B.

G, C are glass pieces fitted in the show case. As here shown, three sheets of glass are positioned in each section. The are held in place as a whole by members C andare spaced from each other by spacing members C C Formed in the spacing members C are openings C which communicate with the openings B and are preferably of the same size and shape as the latter openings, although they need not be essentially so formed.

.Removably positioned within the cavity B is a vessel D. It may be formed to conform in shape to the shape of the cavity B, although it need not be so formed. It is preferably provided with an open top D and is I water tight.

Positioned within it and extending upwardly is a porousvessel' E. As here shown, this vessel takes somewhat the form of a cage and is formed of a netting. Any other form or type of container might be used which would permit air within the cavity B readily to contact the material contained within the vessel E. This material F, may be any hygroscopic agent and may be arranged in the vessel in any manner which will permit ready contact of the air with it.

Where in the specification and claims the expression .multiple glass Walls is used, I mean to define a structure in which each mdividual wall includes two or more thicknesses or panes of glass.

The use and operation of my invention are as follows:

When show cases are assembled, normally.

found, however, that it 1s almost impossible to exclude all moisture and further, as time goes on, leakage will occur even where originally nomoist'ure was admitted, subsequently moisture will come through and moisture in the air finally finds its way into the space between the glass.

However it may get there, once moisture finds its way into the space ''between the glasses, sooner or later, as a result of atmospheric changes. at some time condensation will take place. This will result in greater or less fogging of the glass.

In the form of my invention here shown, such moisture laden air as finds its way for any reason into the space between the glass a Although I have shown an operative device, it will be obvious: that many changes might be made in the size, shape and ar rangement of parts without departing materially from the spirit of my invention, and.

I wish my showing therefore to be taken as in a large sense diagrammatic.

.I'claim:

1. In a 'show case including a frame work and a multiple glass wall inclosing within itself a dead air space,means for removing moisture from such dead air space including a removable container mounted in communication therewith and an air pervious con- 'tainer filled with hygroscopic material, such last mentioned container bein mounted within the former and the two a opted to be removed.

2. In a show case including a frame work and a multiple glass wall inclosing within itself a dead air space, means for removing moisture from such dead air space including a removable water tight container and an air pervious container filled with hygrosco io material, such last mentioned container eing mounted within the water tight container and the'two being mounted in communication with such dead air space.

3. In a show case including a frame work and a multiple glass wall inclosing within itself a dead air space, means for removingmoisture from such dead'air space including a removable water tight container and an air rvious container filled with hygroscopic material, such last mentioned container being mounted within the water tight container and the two being mountedin an in.-

closedspace in communication with such dead air space.

4. Ina show case including a frame work and a glass inclosed dead air space, means for removing moisture from such dead air space including a removable water tight container and an air pervious container filled with hygroscopic material, such last mentioned container being mounted within the water tight container and the two being mounted in. an inclosed space in communication with such dead air space and formed within one of the frameelements of such show case.

5. In a show case. a hollow frame member and a plurality of glass parts supported such air space, and an air pervious vesselmounted within such first mentioned vessel and containing a hygroscopic material.

6. In a show case, a hollow frame member and a plurality of glass parts supported therefrom and cooperating to form a dead air space, such dead air space being in communi cation with the hollow frame member, and a means for removing moisture from the air within such dead air space, said means including a vessel removably mounted within such air space, and an air pervious vessel mounted within such first mentioned vessel and containing a hygroscopic material, in combination with means for. permitting the removal and insertion of said containers.

7. In a show case, a hollow frame member and a plurality of glass parts supported therefrom and cooperating to form a dead air space, such dead air space being in communication with the hollow frame member, and a means for removing moisture from the air within such dead air space, said means including a water tight vessel removably mounted within such air space, and an air pervious vesselmounted within such water tight "essel and containing a hygroscopic material.

8. In a show case, a hollow frame member and a plurality of glass parts supported therefrom and cooperating to form a dead air space, such dead air space being in communication with the hollow frame member, and a means for removing moisture from the air within such dead air space, said means including a water tight -vessel removably mounted within such air space, and an air pervious vessel mounted within such water tight vessel and containing a hygroscopic material, in combination with means for permitting the removal and insertion of said containers.

9. In a refrigerating case including a window frame, spaced panes mounted in said frame to provide spaces therebetween, a channel formed in the frame near an edge of the panes, and extending transversely on each side of a pane, a trough of dehydrating material disposed in the channel and normally sealed off from contact with the atmosphere, and means forming a communication between said trough and each of the spaces between said panes to permit circulation of air through said means for dehydrating the air entrapped between said panes.

10. In a refrigerating case, an observation window comprised of at least three spacedpancs, means for mounting the panes in spaced relation in substantially air tight remunication between adjacent spaces to equalize the pressures there1n,-and means for drying the air flowing between the spaces.

11. In a refrigerating case having a plurality of panes with air spaces between the panes, means including a channel for equalizing thepressures between the spaces, a dehydrating element mounted in said channel to dehydrate the air paming therethrough.

12. In a refrigerating case includinga window frame, spaced panes mounted in said frame, a recess formed in the frame near an edge of the panes and extending transversely of the panes and normally out of communication with outside air, the frame having slots extending substantially parallel to and between adj acent'panes and comprising portscommunicating with said recess to permit maintenance of substantially identical pressures in each of the spaces between said panes, regardless of temperature changes.

13. In a refrigerator show case, a frame,

spaced glass panes in said frame, means sealing the spaced panes and frame against entrance of atmospheric air from either side of said frame, and a pressure stabilizing reser-' voir within the sealed frame and communicating with the space between the panes for maintaining the entrapped air between the panes normally substantially close to atmoss pheric pressure. I

14. In a refrigerator show case, a sealed wall element comprising a frame and spaced panes sealed in the frame to provide an air compartment in said sealed wall, a reservoir sealed within said wall and communicating with said compartment for reducing changes .of pressure due to changes .of temperature .in said compartment, and means for drying air entrapped within said sealed wall.

15. In a refrigerating case, a framework, a plurality of panes mounted in said framework' and forming a plurality of spaces, means substantially sealed off from atmosphe ric pressure on either side of said spaces for equalizing the pressures in a plurality of said spaces as they each,-respectively, tend to vary in res onse to thermal changes.

16. In a re igerating case, an observation window comprised of at "least three spaced panes, means for mounting the panes in spaced relation in substantially air tfgh re-.

lation to said case, and, means substan 1ally sealed off from. atmospheric pressure" on either side of said 'frame and establishing communication'between adjacent spaces to equalize the pressures therein.

17 Ina refrigerating show-case, a casing enclosing a refrigerated chamber, a window to display the contents of said refrigerated chamber comprising a plurality of transparent panels, a plurality of substantially sealed air spaces interposed between said transparent panels, a dehydrating chamber located in the wall of said casing, having a er, and a lid detachably attached to the face of said casing to close the entrance to said dehydrat- "ing chamber, the ports leading from said dehydrating chamber to said respective air spaces serving to maintain a circulation of air to and fro from one of said air' spaces through said dehydrating chamber to the other of said air spaces.

18. In a refrigeratin show-case, a casing enclosing a refrigerate chamber, a window to display the contentsof said refrigerated. chamber comprising a plurality of transparent panels, a plurality of substantially sealed air spaces interposed between said transparent panels, a dehydrating chamber located in the wall ofsaid casing, having a plurality of ports leading therefrom to each of said air spaces and an entrance from one face of the casing wall, a body of dehydrating material located in said dehydrating cham ber,-and a liddetachably attached to the face of said casing to close the entrance to said dehydrating chamber,-the ports leading from said dehydrating chamber to said respective a1r spaces servmgio maintain a clrculation of air to and fro from one of sa1d air spaces through said dehydrating chamber to the having a port leading therefrom to said su stantially sealed air space, dehydrating means located in said dehydrating chamber,

the port leading from said air space to said deh drating chamber being of suflicient caac1ty to maintain a circulation of air to and r0, from said air space to said dehydrating chamber.

20. In a refrigerating show-case, a casing enclosing a refrigerated chamber, a window to display the contents of said refrigerated chamber, comprising a plurality of transmaterial I parent panels and an interposed substantially Y sealed air space, a'dehydrating chamber hav-.

ing .a door giving access thereto and a'port leading tliereto from said substantially sealed air space dehydrating'means located in said dehydrating chamber, the port leading from said air space to said dehydrating chamber bein ;5 suflicient capacityv to maintain a circulatin of air to andxfro, from said air space to said dehydrating chamber.

-21: As a means for removing moisture from air which is confined within a multiple pane glass wall, a hygroscopic material con j taining vessel removably mounted within a confined space within said wall in communication with such confined air, in combination with a second vessel mounted about such first vessel adapted to receive and contain 5 moisture, said former vessel air pervious throughout substantially its entire length.

22. As a means for removing molsture from air which is confined within a multiple pane glass wall, a water tight vessel and a hygroscopic material containing "essel, said latter vessel air pervious throughout substantially its entire length, the latter being mounted within the former and the two being mounted together in such confined space within said wall. 23. As a means for removing moisture from air which is confined within multiple pane glass walls, a water tight vessel and a hygroscopic material containing vessel, said latter vessel air pervious throughout substantially its entire length, the latter being mounted within the former and the two being mounted together in such confined space, within said walls. v

' 24. In a refrigerating show-case, a casing enclosing a refrigerated chamber, a window to display the contents of said refrigerated chamber comprising a plurality of transparent panels and a plurality of interposedsubstantially sealed air spaces, a dehydrating. chamber located in the wall of said casing having a plurality of ports leading therefrom to said substantially sealed spaces, and an entrance from one face of the casing wall, a body of dehydrating material located in said dehydrating chamber, and a lid detachably attached to the face of said casing to close the entrance to said dehydrating chamher, the ports leading from said air spaces -to said dehydrating chamber being respectively utilized to maintain a circulation of air to and fro, from said air spaces to said dehydrating chamber.

Signed at Chicago, county of Cookand State of Illinois, this 15th day of December WILLIAM T. SHERER. 

